Nov 7 (Reuters) - Kansas City Chiefs quarterback Brady Quinn will miss his second straight game due to concussion with Matt Cassel set to replace him on Monday against the Pittsburgh Steelers, the National Football League team said on Wednesday. Quinn, who took over from Cassel as starting quarterback earlier this season, suffered the concussion on Oct. 28 in Kansas City's 26-16 loss to the Oakland Raiders and did not play last week against the San Diego Chargers. ...